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. 2012 Jun 18;10:126. doi: 10.1186/1479-5876-10-126

Table 1.

Demographic characteristics for experimental and control group

Variable Unit Total sample Experimental Group Control group
Average age
Year
31.51
29.47
36.33
S.D.
 
10.31
10.45
13.92
Marital status
Married
%
45.7
44.3
50.0
Unmarried
%
52.1
52.8
50.0
Widowed
%
1.1
1.4
0
Divorced
%
1.1
1.4
0
Years of driving* (Average)
Year
11.15
9.7
14.46
S.D.
 
10.31
9.11
12.24
No cigarettes smoking
%
82%
81%
85%
Education level*
0–9
%
9.0
5.71
16.66
10–12
%
60.0
62.9
43.33
Professional Diploma
%
7.0
11.43
10.00
16+
%
24.0
20.00
30.0
Income*
Under Average
%
52.00
48.6
60.00
About Average
%
16.0
21.4
3.4
Above Average
%
20.0
18.6
23.3
No answer
%
12.0
11.4
13.3
Work status
Salaried employee
%
57.0
61.4
46.7
Self-employed
%
13.0
12.8
13.3
Unemployed
%
6.0
2.9
13.3
Pensioner
%
1.0
0
3.3
Housewife
%
6.0
4.3
10
Student
%
17.0
18.6
13.4
Average number of cars in the household
Cars
1.85
1.83
1.87
S.D.
 
1.24
1.23
1.19
Household size (average)
Persons
5.25
5.4
5.07
S.D.
 
2.00
3.53
1.89
Availability of car for your use
Yes
%
68.1
68.6
70.0
No
%
28.7
31.4
20.0
Sometimes % 3.2 0.0 10.0

Here is a sample which included both the experimental and control groups. It consisted of 100 participants, whose ages ranged from 19 to 60 years (mean = 31.51; S.D = 10.31). 45.7% were married. Data analysis shows that the percentage of participants with a graduate degree (B.A., Master’s, Ph.D., or equivalent) was 24%. Most striking is that the income of 52% of the participants was below average (while the average is 8,300 Shekels per month), and 57% were salaried employees. Most of the participants (72.1%) found work outside the town; the average number of cars in the household was 1.85 (s.d = 1.24), and not surprisingly, 68.1% of the participants had a car for their use. All the participants possessed a driving license. Table 1. showed no statistical significant effect between EG and CG, for the following variables: years of driving, education and income. P-value (p = 0.284; p = 0.690 and p = 0.503 respectively).